Help with helix 5 DI please!

I just bought a helix 5 di gps and a helix 7 si gps.
upon using for the first time the depths were alternating between 300 and 900 feet in 6 foot of water with 2 feet of weeds on both units.

after lifting both units out of the water and putting back in the Helix 7 started to work normally.

i have the helix 7 mounted on "DA Ducer" and the helix 5 on my trolling motor.
the helix 5 will only read right occasionally if i take the transducer and wipe it with a clean cloth then put it back in the water.

after a short (5 to 10 minutes) while ,the helix 5 starts to show 300 to 900 feet deep again.

i have had a 597 di on my trolling motor for years and never experience this before. the main reason i bought the helix di gps is my old unit gps stopped working.

Is there a setting that i need to adjust or is something wrong with the helix 5 or the transducer?

the helix 7 seems to work fine.

If you are trying to use both units at the same time they will give false readings from reading the others pings.

weird! i had a 798 and a 597 both running and did not get that problem.

Crosstalk interference occurs when matching frequency pings are transmitted from 2 separate sources at the same time ...

Each unit is "listening" for return echoes of a certain frequency and it confuses the unit's "listening" phase by "hearing" return echoes from a transmit pulse it didn't send = so it doesn't know what to do with those "errant" echoes ...

Crosstalk interference is more prevalent in deeper water or with wider beam shapes ...

Attachment 303583

Rickie

I generally push "stop sonar" on the one I'm leaving. If you aren't doing that give it a try.